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Silverlight實(shí)現(xiàn)簡(jiǎn)單鼠標(biāo)手勢(shì)控制頁(yè)面滾動(dòng)

開發(fā) 后端
看了MSDN的WebCast的《用Silverlight實(shí)現(xiàn)簡(jiǎn)單鼠標(biāo)手勢(shì)控制頁(yè)面滾動(dòng)》視頻,筆者就他的講述寫出了一個(gè)小例子。希望對(duì)大家有所幫助。。

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上圖藍(lán)色部分就是鼠標(biāo)手勢(shì)控制的部分,劃過(guò)這塊區(qū)域,瀏覽器的滾動(dòng)條就會(huì)做出相應(yīng)的反應(yīng)。我寫的這個(gè)程序只能適合在IE,F(xiàn)irefox我測(cè)試了一下沒(méi)有反應(yīng),其他瀏覽器我并沒(méi)有進(jìn)行測(cè)試。

這個(gè)程序的設(shè)計(jì)目標(biāo):用Silverlight實(shí)現(xiàn)一個(gè)浮動(dòng)在頁(yè)面右下角的鼠標(biāo)手勢(shì)控制塊,讓用戶用鼠標(biāo)手勢(shì)控制頁(yè)面滾動(dòng),提供更好的用戶瀏覽體驗(yàn)。

鼠標(biāo)手勢(shì)設(shè)計(jì)計(jì)劃:

1.制作一個(gè)浮動(dòng)DIV,承載Silverlight。

2.實(shí)現(xiàn)鼠標(biāo)移動(dòng)方向與速度識(shí)別

3.調(diào)用js控制scrollbar

4.測(cè)試

鼠標(biāo)手勢(shì)詳細(xì)步驟:

1.制作一個(gè)浮動(dòng)DIV,承載Silverlight。

Code
 1<div id="silverlightControlHost">
 2  <object data="data:application/x-silverlight-2,"
       type="application/x-silverlight-2" width="100%" height="100%">
 3              <param name="source" value="ClientBin/Scoll.xap"/>
 4              <param name="onerror" value="onSilverlightError" />
 5              <param name="background" value="blue" />
 6              <param name="minRuntimeVersion" value="3.0.40624.0" />
 7      <param name="autoUpgrade" value="true" />
 8     <param name="windowless" value"true" />
 9    <a href="
       style="text-decoration: none;">
10   <img src="
      alt="獲取 Microsoft Silverlight" style="border-style: none"/>
11              </a>
12          </object>
<iframe id="_sl_historyFrame" style='visibility:hidden;height:0;width:0;border:0px'>
</iframe></div>
用id為silverlightControlHost的DIV來(lái)承載Silverlight。用下面的js代碼來(lái)使div浮動(dòng):
 

Code
 1 <script  type ="text/javascript">
 2      function Pos(w, h) {
 3          var silverdiv = document.getElementById("silverlightControlHost");
 4          silverdiv.style.width = w;
 5          silverdiv.style.height = h;
 6          silverdiv.style.position = "absolute";
 7          silverdiv.style.zIndex = 100;
 8          silverdiv.style.top =
 9            document.documentElement.scrollTop + document.documentElement.clientHeight - h;
10          silverdiv.style.left =
11            document.documentElement.scrollLeft + document.documentElement.clientWidth - w;
12         
13      }
14  </script>
15  <script type ="text/javascript">
16      Pos(60, 60);
17      window.onscroll = function() {
18          Pos(60, 60);
19      }
20  </script>

2.實(shí)現(xiàn)鼠標(biāo)移動(dòng)方向與速度識(shí)別

Code
 1 public MainPage()
 2        {
 3            InitializeComponent();
 4            timer.Completed += new EventHandler(timer_Completed);
 5        }
 6
 7        void timer_Completed(object sender, EventArgs e)
 8        {
 9            //throw new NotImplementedException();
10            if (Math.Abs(v_x) <= V_Min && Math.Abs(v_y) <= V_Min)
11            {
12                v_x = 0;
13                v_y = 0;
14                const_time = 0;
15                Current_Time = 0;
16            }
17            else
18            {
19                if (Current_Time < const_time)
20                {
21                    Current_Time++;
22                }
23                else
24                {
25                    if (Math.Abs(v_x) > V_Min)
26                    {
27                        v_x = Math.Sign(v_x) * (Math.Abs(v_x) - Math.Abs(dec));
28                    }
29                    if (Math.Abs(v_y) > V_Min)
30                    {
31                        v_y = Math.Sign(v_y) * (Math.Abs(v_y) - Math.Abs(dec));
32                    }
33                }
34                ScollBy(v_x, v_y);
35                timer.Begin();
36            }
37        }
38        //慣性計(jì)算
39        double dec = 0.3;
40        const double V_Min = 0.3;
41        double Current_Time = 0;
42
43
44        Point StartPoint;//開始點(diǎn)
45        Point EndPoint;//結(jié)束點(diǎn)
46        List<Point> TempPoints = new List<Point>();//點(diǎn)集合
47        bool IsRecording = true;//是否錄制
48        double v_x;
49        double v_y;
50        double const_time;
51        public Storyboard timer = new Storyboard() { Duration = new Duration(new TimeSpan(0, 0, 0, 0, 10)) };
52        //timer.Interval=10;
53       
54        private void MainInput_MouseMove(object sender, MouseEventArgs e)
55        {
56            if (IsRecording)
57            {
58                TempPoints.Add(e.GetPosition(null));
59            }
60        }
61
62        private void MainInput_MouseEnter(object sender, MouseEventArgs e)
63        {
64            P.Points.Clear();
65            P.Points.Add(e.GetPosition(null));
66            IsRecording = true;
67            StartPoint = e.GetPosition(null);
68            TempPoints.Clear();
69            TempPoints.Add(StartPoint);
70        }
71
72        private void MainInput_MouseLeave(object sender, MouseEventArgs e)
73        {
74            IsRecording = false;
75            EndPoint = TempPoints[TempPoints.Count - 1];
76            v_x = (StartPoint.X - EndPoint.X) / TempPoints.Count;
77            v_y = (StartPoint.Y - EndPoint.Y) / TempPoints.Count;
78            const_time = 100 / TempPoints.Count;
79            P.Points.Add(EndPoint);
80            timer.Stop();
81            timer.Begin();
82        }

3.調(diào)用js控制scrollbar

Code
1public void ScollBy(double x, double y)
2        {
3            //window.scollBy(x,y);
4            //直接調(diào)用js
5  System.Windows.Browser.HtmlPage.Window.Eval
(string.Format("window.scrollBy({0},{1});",x,y));
6        }
4.測(cè)試。

以上就可以完成這樣的一個(gè)功能了。

【編輯推薦】

  1. Office 2010將使用Silverlight改善用戶體驗(yàn)
  2. 微軟.NET平臺(tái)主管談Silverlight企業(yè)級(jí)開發(fā)
  3. Flash與Silverlight多領(lǐng)域?qū)崪y(cè)對(duì)比
  4. 微軟宣稱Silverlight裝機(jī)量超過(guò)三億
  5. 圖解Silverlight 3的7個(gè)新功能
責(zé)任編輯:彭凡 來(lái)源: 博客園
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